A cobalt(II) salt was dissolved in water and reacted with excess acetylacetone (2,4-pentanedione, CH₃COCH₂COCH₃) and hydrogen peroxide. A green solid was formed that gave the following results for elemental analysis: C, 50.4 per cent; H, 6.2 per cent; Co, 16.5 per cent (all by mass). Determine the ratio of cobalt to acetylacetonate ion in the product.